CN101936014A - On-line real-time monitoring method for safety stability of foundation pit during stratum vibration - Google Patents
On-line real-time monitoring method for safety stability of foundation pit during stratum vibration Download PDFInfo
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- CN101936014A CN101936014A CN 201010278392 CN201010278392A CN101936014A CN 101936014 A CN101936014 A CN 101936014A CN 201010278392 CN201010278392 CN 201010278392 CN 201010278392 A CN201010278392 A CN 201010278392A CN 101936014 A CN101936014 A CN 101936014A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 33
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Abstract
The invention belongs to the technical field of foundation pit construction of civil engineering, and in particular relates to an on-line real-time monitoring method for the safety stability of a foundation pit during stratum vibration. In the method, sensors buried under the ground receive vibration response information of a soil (or structure) stratum, the acquired information is transmitted to a computer in a data form, and the computer synchronously displays, analyzes and stores the data acquired by each sensor node in real time by using acquisition control software, so that real-time evaluation can be carried out on the safety stability of the foundation pit; and at the same time, the method ensures that data statistics can be carried out on the stability of the foundation pit at the most important time, thereby being beneficial to detecting the safety stability of the foundation pit in a period when the stratum frequently vibrates. The invention acquires an instant and precise foundation pit monitoring process, and enables the whole excavating construction process of the foundation pit to be faster, safer and more economic.
Description
Technical field
The invention belongs to civil engineering foundation pit construction technical field, concrete method of the foundation ditch security and stability being carried out when being meant the vibrations of a kind of stratum on-line real time monitoring.
Background technology
In stratum vibrations multiple zone construction, many construction operating modes such as large-scale component lifting, the strutting system of plate, foundation ditch steel support operation or the like and will face disastrous threat.It is investigated inquiry, at present domestic the antidetonation existing comparatively standard and the regulation of science to the engineering construction product, but detailed standard, regulation or technical requirements are not arranged as yet to how resisting stratum vibrations disaster in the work progress.Therefore shaking multiple zone according to the stratum studies foundation pit construction worker method, and the stratum shattering zone foundation pit construction that can be from now on provides reference, has bigger realistic meaning.
Shake multiple zone carries out in the foundation pit construction process on the stratum, it is a considerable link that the security and stability of foundation ditch detects, one in time, foundation ditch monitoring process means accurately, can be so that whole excavation of foundation pit work progress be quicker, safer, more economical.
Multiple regional foundation pit construction traditional monitoring worker method is shaken on the stratum, and mainly have the following disadvantages: (1) can not monitor in real time, promptly can not monitor the distortion situation of measuring point at any time, thereby can not in time reflect the ANOMALOUS VARIATIONS of base pit engineering in the work progress.(2) construction is disturbed greatly,, disturbed very big construction operation especially hauling operation owing to need to set up instrument in the deformation monitoring.(3) randomness and the response time history weak point thereof that takes place because of the stratum vibrations, traditional monitoring is difficult to capture foundation ditch stratum vibrations reaction information (4) monitoring expense height, same section will repeatedly be monitored repeatedly, and observation process is loaded down with trivial details, personnel selection is many, length consuming time, causes the monitoring expense higher.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, the response characteristic of stratum vibrations when obtaining more foundation ditch site operation reliably simultaneously, and randomness and the manual testing's difficulty of considering stratum vibrations generation, foundation ditch security and stability on-line real time monitoring method when proposing the vibrations of a kind of stratum, adopt the security and stability that stratum oscillatory acceleration remote wireless monitoring system shakes multiple regional foundation ditch to the stratum to carry out long-range round-the-clock monitoring, by receiving the information that the vibrations of the soil body (or structure) stratum are reacted at the underground sensor of imbedding, the information of gathering is transferred to computer with the form of data, computer shows the real time data synchronization that each sensor node collects by acquisition controlling software, analyze and storage, so that can carry out real-time assessment to the security and stability of foundation ditch, guarantee that simultaneously the stability to foundation ditch is carried out data statistics most important the time, help the foundation ditch security and stability being detected in the time period that the stratum vibrations take place frequently.For the foundation pit construction in the multiple zone of vibrations, stratum, round-the-clock ground on-line real time monitoring can be carried out to the building site in strange land in the scene.
Purpose of the present invention realizes being finished by following technical scheme:
Foundation ditch security and stability on-line real time monitoring method when a kind of stratum is shaken, at first bury sensor underground in the on-the-spot periphery punching of this foundation pit construction, the backfill of holing after burying underground, then described sensor is delivered to the survey data of collecting in the memory cell by radio modem, described memory cell and strange land master server carry out data communication by wireless network, implement remote monitoring.
Need carry out waterproofing work in advance before the sensor is embedding; Compartment adopts the moulding of ZL102 aluminium alloy compression casting herein, have anticorrosion, water resistance good, characteristics such as mechanical strength height, its barrier propterty can reach the grade of NEMA4X (IP65).The form of frosted or plastic-blasting is adopted in surfacing.
The above-mentioned sensor of burying underground is some Wireless Acceleration Sensor nodes, and described Wireless Acceleration Sensor node has inclinometer, in accordance with regulations the degree of depth, direction is embedding and antenna lead is picked out ground;
Advantage of the present invention is, having overcome traditional monitoring worker method can not be in time, the shortcoming big, that the monitoring expense is high is disturbed in construction, obtained one in time, foundation ditch monitoring process means accurately, make that whole excavation of foundation pit work progress is quicker, safer, more economical, reduced risk and construction cost, improved the performance of enterprises and the market competitiveness in stratum vibrations multiple zone construction.
Description of drawings
Fig. 1 is the structural principle schematic diagram of the inventive method;
Fig. 2 is the embedding position view of sensor;
Fig. 3 is the construction process schematic diagram.
The specific embodiment
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
What label 1-7 represented among the accompanying drawing 1-2 is: low-consumption wireless modem 1, Wireless Acceleration Sensor 2, Wireless Acceleration Sensor node 3, memory 4, modem 5, mobile telephone network 6, master server 7.
Accompanying drawing 1 is the structural principle schematic diagram of the inventive method.As shown in Figure 1, the theory structure of the inventive method mainly comprises a sensor, on-the-spot memory cell and at the master server on the internet.Wireless Acceleration Sensor node 3 is made up of a low-consumption wireless modem 1, two Wireless Acceleration Sensor 2.Memory cell is made up of a band notebook computer of alternating current or charged pool or solar powered control storage 4, modem 5 and mobile telephone network 6.As required, can also have miscellaneous equipments such as inclinometer or water content sensor in the Wireless Acceleration Sensor node.
The use principle of the inventive method is, sensor is installed in the soil body of foundation ditch periphery, by radio modem 1 survey data of collecting delivered to memory cell then; Data are transferred to the internet via mobile telephone network 6.Master server 7 detects improper data, the issue warning.
In the present embodiment, adopt and bury Wireless Acceleration Sensor node 3 underground as sensor.The Wireless Acceleration Sensor node is easy to use, greatly saved the test in owing to laying the man power and material that wired data acquisition equipment consumes repeatedly, be widely used in vibration acceleration data acquisition and industrial equipment on-line monitoring.The system node compact conformation, volume is small and exquisite, is made up of power module, acquisition processing module, radio receiving transmitting module, and built-in acceleration transducer is encapsulated in the PPS plastic casing.The high sampling rate of each node can be set to 4KHz, and each passage is equipped with anti-aliasing low pass filter.The data of gathering both can transfer to memory cell by real-time radio, also can be stored in the built-in 2M data storage of node, had guaranteed the accuracy of image data.The air transfer rate of node can reach 250Kbps, and communication distance can reach 300m outside the effective chamber.Design of node has special power management software and hardware, and under real-time interrupted transmission situation, node power consumption is 30mA only, uses built-in rechargeable battery, but continuous measurement 8 hours.If select to have the node of USB interface, both can charge to node by the USB interface, also can download to the computer the inside to the data in the memory apace.Memory cell provides USB, Ethernet, GPRS/CDMA, both can insert local computer, also can carry out remote transmission by other wireless networks such as INTERNET.
During use, require to choose typical monitoring section as the monitoring place in conjunction with the multiple regional engineering of stratum vibrations according to actual measurement.Fig. 2 is the embedding position view of sensor, and promptly the field monitoring measuring point is arranged schematic diagram.Bury Wireless Acceleration Sensor node 3 underground in the punching of foundation ditch periphery, 1 to 3 meter respectively of the depth of burying, 1 meter of longitudinal separation, 5 meters of horizontal spacings.
Referring to construction process Fig. 3, during construction, the Wireless Acceleration Sensor node that will carry out waterproofing work after the boring in advance is embedding and antenna lead picked out the backfill (compactness is made every effort near original state soil body compactness) of holing behind the ground by the degree of depth, the direction set.Utilize monitoring software to carry out components and parts debugging and initial parameter setting.Simultaneously, server is set to realize remote monitoring in the strange land.
Wherein, detected parameters is set as follows:
(1) be other the movable noises beyond the vibrations of shielding stratum, the sensor response acceleration is set at 0.01g, is equivalent to 2.5 grades of earthquake degree;
(2) monitoring frequency domain 0.5 is to 200Hz;
(3) transfer of data is set at auto state, when earthquake surpasses 2.5 grades, and the sensor response, webmaster transmits data automatically;
(4) under the external power supply power down mode, the farm labourer of the self-powered setting of Wireless Acceleration Sensor does 8 hours time does not influence normally carrying out of monitoring to guarantee that the stratum vibrations cause power failure.
The vibrations of the stratum mentioned among the present invention refer to that the stratum that is caused by activity such as earthquake, soil body landslide, constructions demolition or heavy-duty machinery facilities shakes.
Claims (5)
1. foundation ditch security and stability on-line real time monitoring method when a stratum is shaken, it is characterized in that at first burying sensor underground in the on-the-spot periphery punching of this foundation pit construction, the backfill of holing after described sensor is buried underground, then described sensor is delivered to the survey data of collecting in the memory cell by radio modem, described memory cell and strange land master server carry out data communication by wireless network, implement remote monitoring.
2. foundation ditch security and stability on-line real time monitoring method is characterized in that described sensor is a Wireless Acceleration Sensor when a kind of stratum according to claim 1 was shaken.
3. foundation ditch security and stability on-line real time monitoring method is characterized in that described sensor need carry out waterproofing work before embedding in advance when a kind of stratum according to claim 1 was shaken.
4. foundation ditch security and stability on-line real time monitoring method when a kind of stratum according to claim 1 is shaken, it is characterized in that when burying sensor underground, what buried underground is the some Wireless Acceleration Sensor nodes that comprise Wireless Acceleration Sensor, described Wireless Acceleration Sensor node in accordance with regulations the degree of depth, direction is embedding and antenna lead is picked out ground.
5. foundation ditch security and stability on-line real time monitoring method is characterized in that described Wireless Acceleration Sensor node has inclinometer when a kind of stratum according to claim 1 was shaken.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010278392A CN101936014B (en) | 2010-09-12 | 2010-09-12 | On-line real-time monitoring method for safety stability of foundation pit during stratum vibration |
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| CN201010278392A CN101936014B (en) | 2010-09-12 | 2010-09-12 | On-line real-time monitoring method for safety stability of foundation pit during stratum vibration |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518109A (en) * | 2011-12-14 | 2012-06-27 | 上海交通大学 | Dendrite type data acquisition method and device |
| CN103953077A (en) * | 2014-05-08 | 2014-07-30 | 国网上海市电力公司 | Sensor node used for monitoring underground substation construction displacement |
| CN105064311A (en) * | 2015-08-06 | 2015-11-18 | 中国水利水电第六工程局有限公司 | Digital management and control system for foundation construction |
| CN107366312A (en) * | 2017-06-06 | 2017-11-21 | 张双喜 | Deep pit monitor information monitoring system |
| CN109754817A (en) * | 2017-11-02 | 2019-05-14 | 北京三星通信技术研究有限公司 | signal processing method and terminal device |
| CN111337214A (en) * | 2020-03-10 | 2020-06-26 | 大连理工大学 | Method for measuring stability of surface protection block based on acceleration sensor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102518109A (en) * | 2011-12-14 | 2012-06-27 | 上海交通大学 | Dendrite type data acquisition method and device |
| CN102518109B (en) * | 2011-12-14 | 2014-04-16 | 上海交通大学 | Dendrite type data acquisition method and device |
| CN103953077A (en) * | 2014-05-08 | 2014-07-30 | 国网上海市电力公司 | Sensor node used for monitoring underground substation construction displacement |
| CN105064311A (en) * | 2015-08-06 | 2015-11-18 | 中国水利水电第六工程局有限公司 | Digital management and control system for foundation construction |
| CN105064311B (en) * | 2015-08-06 | 2017-02-01 | 中国水利水电第六工程局有限公司 | Digital management and control system for foundation construction |
| CN107366312A (en) * | 2017-06-06 | 2017-11-21 | 张双喜 | Deep pit monitor information monitoring system |
| CN109754817A (en) * | 2017-11-02 | 2019-05-14 | 北京三星通信技术研究有限公司 | signal processing method and terminal device |
| CN111337214A (en) * | 2020-03-10 | 2020-06-26 | 大连理工大学 | Method for measuring stability of surface protection block based on acceleration sensor |
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| CN101936014B (en) | 2012-10-10 |
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Address after: 200232 Xuhui District, Liuzhou Wu Road, Lane No. 13, No. 3, No. Applicant after: Shanghai urban construction Municipal Engineering (Group) Co., Ltd. Address before: 200232 Xuhui District, Liuzhou Wu Road, Lane No. 13, No. 3, No. Applicant before: Shanghai No.2 Municipal Engineering Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: SHANGHAI NO.2 MUNICIPAL ENGINEERING CO., LTD. TO: SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO., LTD. |
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Effective date of registration: 20180320 Address after: 200093 room A107, room A107, No. 1436, Yangpu District military road, Shanghai Patentee after: Shanghai Intelligent Transportation Co., Ltd. Address before: 200232 Xuhui District, Liuzhou Wu Road, Lane No. 13, No. 3, No. Patentee before: Shanghai urban construction Municipal Engineering (Group) Co., Ltd. |
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Effective date of registration: 20190516 Address after: No. 3, No. 13, dragon Wu Road, Xuhui District, Shanghai Patentee after: Shanghai urban construction Municipal Engineering (Group) Co., Ltd. Address before: 200093 A107, 46 building, 1436 military industrial road, Yangpu District, Shanghai. Patentee before: Shanghai Intelligent Transportation Co., Ltd. |